Elastic tire for road-wheels.



No. 819,374. PATENTEDMAY 1 1906 E.G.P.OTTO.' ELASTIC TIRE FOR ROAD. WHEELS.

APPLICATION FILED MAR.7, 1905.

fauczazar" wwwsa WZ PATENTED MAY 1, :1906. I

,E. 0. P. OTTO. ELASTIC TIRE FOR ROAD WHEELS.

APPLICATION FILED MAR.7, 1 905.

2 SHEETS-SHEET z.

To all whom it may concern.-

UMTED STATEEd PATENT @FFXQE.

EDWARD CHARLES FREDERICK OTTO, OF LONDON, ENGLAND, ASSIGNOR OF ONE'HALF TO GEORGE FREDERICK RICHARDSON, OF LEE, ENG- LAND.

Specification of Letters Patent.

Patented May 1, 1906.

Application filed. March 7, 1905. Serial No. 248333.

Be it known that I, EDWARD CHARLES FREDERICK Orro, engineer, a subject'of the King of Great Britain and Ireland, residing at 108 Chestnut Grove, Balham, London, Erlwland, have invented certain new and usein ing is a specification.

The present invention relates to improvements in elastic tires for motor and other road vehicles, the object being to provide a rubber tire with a tread of great resiliency and durability and which will effectually prevent side slip or skidding of the vehicle.

The invention consists in embedding in the tread of the rubber tire, While the latter is in its plastic state prior to vulcanization, studs of metal or fiber, the studs, if of metal other than brass, being coated with brass, whereby on vulcanizing the tire-tread the studs become chemically united to the rubber.

Referring now to the accompanying dr'awin s, Figure 1 is a sectional view of a solidru ber tire with a tread constructed according to this invention. Fig. 2 is a plan of the same. Figs. 3 and 4 are cross-sectional views of pneumatic tires with this invention applied in two ways. Fig. 5 is a cross-section of a se arate rubber band with the iuvention app ied. Figs. 6 and 7 are detached views of two forms of studs.

In c:irrying the invention intoeliect in one manner (shown in Figs. 1 and 2) applied to a solid tire 1 embed in the tread a of the tire 0 while it is in its plastic state-that is, prior to vulcanization-studs b, of metal, which are referabl shaped with heads 6 and enlarged inner enrs (Z, whichare suitably curved or rounded, as shown in Fig. 1.

In manufacturing the tire the tread pol tion (Land the tire proper, 6, may be separately molded, the studs being then emboddcd in the tread, which is subsequently placed over the, tire proper, thcwholc tirc bc mg then -vulcanized at one operation, whereby the tread and the tire proper are unified without damaging the canvas and the studs!) are chemically united in the tread of the-tire by this latter process.

In cases where the studs are mudc oi snctnl other than brass it is most important that mlprovements in Elastic Tires for Motorthey shall be coated with brass on the surfaces which come in contact with the rubber so that a mechanical attachment to the rubber is provided, as well as the chemical union to the rubber resulting from vulcanization.

In Figs. 6 and 7 two convenient forms of stud are shown, theformer having a screwed shank and the latter a plain one, which, if desired, may be provided with grooves or recesses to increase its hold in the rubber.

The durability of the studs when made of iron or steel may be increased by case or otherwise hardening them before coating themwith brass.

For the urpose of 5 reading the pressure of the StI/K s under lost over a large area of the tire proper the continuous strip or strips fof' canvas, webbing, or the like may be in sorted in'the rubber, so as to provide a resistance to the inward pressure of the stud, thus forcinginto'disfiguration a large amount of rubber lying'not only directly, around these studs, but for some distance around them.

it is preferable to pri'ivid-e a groove or grooves g attire-bottom ol' the tire in order that "disiiguratioiroi the tire may take place more easily. i

It will be readily seen that this invention may be applied to pncunmtic tires, the studs,

as before,- being embedded in the trend of the tire (see Fig. 3) while it is in its plastic siuic prior to vulcm'lizution. The tire itself may be of any convenient construction, but ispro vidcd with a thickened tread (L for the reception of the studs and with a hlycrfof canvas or the like for distributing the pressure of the studs. vVhcn vulcanizinp; the tire, which may he cll'cctcd in one opcrat ion, the studs hecome securely vulcanized to the adjacent rubber.

In applying this invention to n pncuumiic tire constructcd of several parts and shown in Fig. 4- thc studs are vulcanized into a rubbcr tread, which is vulcanized by a cold procroo ess in. any usual manner to the rubber tire. A strip or layer of leather may be interposed to distribute the pressure of the studs on the tire proper and to prevent puncture of the tire when in use.

Instead of a strip or layer of leather, canvas or the like may be employed, and in this case the tread may be vulcanized to the tire proper by a hot process.

The invention may very conveniently be applied to separate covers or treads for use on existing tires, in which case the studs are embedded in the rubber of the tread when it is in its plastic condition and are vulcanized therein when the separate tread is vulcanized. A non-skiddiny tread adapted to be stuck or fastened to existing tires is thus provided.

In some cases the studs may be made of hard fiber turned to the required form but it is preferred to employ iron or steel studs on a'clcount of their superior strength and durabi ity.

By means of this invention it is possible to produce tires with a tread or" great resiliency and durability and which effectually prevent a side slip of the vehicle. The union between the studs and rubber is erfect and the studs are not liable to work oose and come out.

Consequently water cannot pass into the tire around the shanks of the studs.

Having this described my invention,what I claim as new,and desire to secure by Letters Patent, is

l. A rubber tire having brass-coated me tallic studs vulcanized into its tread, substantially as described.

2. A. rubber tire having studs vulcanized into its tread, the studs having bases embedded in the tread in order to distribute the pressure, substantially as described.

3. Rubber tires and the like havin" in combination a body part of rubber, an metallic non-skidding studs vulcanized into f's'aid body part, substantially as described.

4. Rubber tires and the like havingin coinbination a body art of rubber, brass-coated studs vulcanize into said body part, substantially as described.

5. Solid-rubber tires and the like having in combination a body part of rubber, brasscoated studs vulcanized into said body part substantially as described.

6. Pneumatic tires having an outer cover in the tread of which studs are vulcanized substantially as described.

7. A separate rubber tread for pneumatic tires in which tread studs are vulcanized, substantially as described.

8. As an article of manufacture, a rubber tire, having a tread of rubber, brass -coated studs let into said tread while the rubber is in its plastic state prior to vulcanization and subsequently vu canized therein, substantially as described.

9. A tire having a rubber body, a rubber tread, a pressure-distributing strip interposed between the rubber bod and the rubber tread, brass-coated non-skidding studs vulcanized into said tire, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD CHARLES FREDERICK OTTO. 'Witnesses:

ALBERT E. PARKER, FRANCIS J. BIGNELL. 

